Prejudice has moved from interracial couples to gay couples. Lyra and Bon Bon get married and taste this head-on. Applejack starts coming out to her family and friends, with Twilight's help. Derpy's children are adopted.
After spending Nightmare Night in Ponyville, Luna decides on how to reward the six mares who defeated Nightmare Moon and saved her from herself: Marriage.
Twilight Sparkle's friends have lived long and happy lives. Now their time is coming to an end, but Rainbow Dash, at least, will not go gently. Twilight has the power to save her friend's life. Is it worth violating the natural order?
In war-torn Equestria, two pegasi's love blossoms. While the rest of their country is at war, they flee to the Arctic north, and soon find that what they were looking for will take far more than will power to retrieve.
Rarity got a new job in Canterlot: designing for the top ponies in all of Equestria! But it comes with a price. Rarity sends letters to her friends back in Ponyville, and they will soon find out about what Rarity REALLY does.
After being supposedly 'reformed', Discord returned to Canterlot with Princess Celestia. Once there he realizes that it would be a long run before the ponies would accept him. Shunned and mistrusted, Discord slowly returns to his older ways
Celestia decides to attempt to reform Discord, so she taps a pony with a similar background for the job. ("Keep Calm and Flutter On" as it occurs in the Petriculture AU.)
Pinkie Pie finds herself in a position where she can no longer recall the years she has spent in Ponyville, as if the memories were erased from her mind entirely. She must rediscover herself, her love for her friends, and her passion for life.
Spike and Rainbow Dash have gotten over the first minor hurdle in their relationship, and now it's time for everypony else to be told. But not everypony will react the same. Sequel to Rainbow Dash's Spike.
Celestia is dying. Or at least it seems so. Afflicted with a curse that is destroying her very nature, she sets a plan in action. The Bearers of the Elements of Harmony will take the throne in her wake... Not that they know that yet...